Actually, you already commented on it once and I replied.  We were observing a bunch of errors importing courses a few months ago, when we added this; I don't recall what the exceptions were, but there were several kinds.

The idea is that such errors really ought to be surfaced to users, and not terminate the import.  Also, without logging the exception, the filename of the file causing the error is unknown.  This at least surfaces the error to our production team (since they have access to the logs).